Key Definitions for Aggression
Aggression - in sport, behaviour intented to harm another person, physically or psycologically outisde the laws of the game.
Assertive behaviour - the use of physical force that is within the rules or ethics of a sport and is therefore legitimate.
Hostile aggression - the intention to harm outside the rules often as an emotional response to another performer or situation, the sole purpose being to cause harm or injury.
Instrumental aggression - aggression that intends to harm as a means to another goal.
Channelled aggression - feelings of aggression that are diverted into useful positive actions.